22151001 has 16 divisors (see below), whose sum is σ = 30965760. Its totient is φ = 14058000.

The previous prime is 22150993. The next prime is 22151011. The reversal of 22151001 is 10015122.

It is not a de Polignac number, because 22151001 - 2³ = 22150993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22151011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16680 + ... + 17958.

It is an arithmetic number, because the mean of its divisors is an integer number (1935360).

Almost surely, 2^22151001 is an apocalyptic number.

It is an amenable number.

22151001 is a deficient number, since it is larger than the sum of its proper divisors (8814759).

22151001 is a wasteful number, since it uses less digits than its factorization.

22151001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 22151001 is about 4706.4849941331. The cubic root of 22151001 is about 280.8435487972.

Adding to 22151001 its reverse (10015122), we get a palindrome (32166123).

The spelling of 22151001 in words is "twenty-two million, one hundred fifty-one thousand, one".